Hand planing machine



July 26 1927'` G, JEHLE HAND PLANING MACHINE Filed Aug'. 27. 1925v Patented July 26, 1927.

UNITED STATI-:s

GOTTFRIED JEHLE, OF ZURICH, SWITZERLAND.

HAND PLANIN MACHINE Application led August 27, 1925. Serial NQ. 52,916.

This invention relates to a hand planing machine which can be used for different wood work, the machine being of such shape that it can be employed for working at points of the workpiece which are not easily accessible. The hand planing machine is of very simple construction,.handy and compact, so that it will certainly soon be generally adopted by turners, carpenters, coach builders, Coopers and others. n

The machine, according to the invention, comprises a casing with handle in which casing a knife cylinder of solid cross section is mounted so that it can be rotated from one end bv means of a flexible shaft driven from a motor, the other end of the knife cylinder being flush with the corresponding open end of the casing. The casing has two. bearing faces for guiding the planing machine upon the workpiece, at least one of said bearing faces being adjustable with regard to the knife cylinder in order to regulate the cutting depth.

An embodiment of the invention is shown, by way of example, in the accompanying drawing, in which Fig. 1 is a front elevation partly in section. Fig. 2 is a side elevation partly in section on line fr-B of Fig. 1.

F ig. 3 is a longitudinal section on line C-D of Fig. 2.

T he planing machine according to the 1nvention comprises a cylinder casing 1 on which a handle 2 is fixed by means of screws 3. The casing 1 is open at one end and in the other closed end a bushing 5 is inserted. In this bushing the axle 7 of a knife cylinder 6 is journalled, said knife cylinder and said axle being made in one piece in order to obtain perfect stability. The knife casing being, with the same object in view, of solid cross section as can be seen from the drawing.

The free end 8 of the knife cylinder is flush with the open end l of the casing 1 so that the knives 10 mounted in slits 9 of this end S of the knife cylinder may be utilized for their entire length.

The open end l of the casing 1 vcan be moved at the planing along a ruler or the like, and the machine can be used for planing surfaces which stand at an angle to the planing surface.

The casing 1 has two bearing faces 11, 12 standing approximately tangentially to the knife cylinder and designed to guide'the machine on the work-piece at the planing. At

least one of these bearing faces 11, 12 is adjustable on the casing 1 with regard to the knife cylinder, said bearing 12 being`arranged on a plate 13 which, by means of screw bolts 14 screwed into bores 15 ofthe casing, is adj ustably mounted on said casing. Gn the free threaded end 16 of each of said bolts 14 a ring 17 is fixed against which bears a` spring 18 the other end of which bears against a shoulder in the enlarged portion ci' bore 16. rf'hese springs 18 have the tendency to press the plate 13 against the casing. An adjusting screw 19 has a head 20 at the outer end, the inner end bearing against the plate 13. l/Vhen the head 20 is rotated the plate 13 isnioved away fiom the casing 1 in opposition to theV action of the spring 18 and adjusted with regard to the knife cyliiider or the knives 10 of said cylinder in order to regulate the depth at whichv the knives 10 cut into said workpiece.

The knives 10 are inserted into slits 9 of the solid knife cylinder inwhich cylinder grooves 21 of semi-circular cross section are arranged underneath the cutting edges of the knives. These grooves 21 are designed to collect the chips which can drop out through a segment-shaped opening 22 of the casing 1 said opening extending over the entire length of the'knife cylinder.

The planing' machine is driven by means of a flexible shaft 23 from a motor, said shaft being connected at the one end withv the outer end of the axle 7 by any convenient means which can be easily detached. In Fig. 1 a sleeve 24 is shown which is rotatably connected with the flexible shaft 23 and on which an adjusting screw 25 is mounted adapted to engage with an annular groove 2G of axle 7.

On the inner end of the sleeve 24 claws 27 are arranged adapted to be brought in engagement with the claws of a clutch element 28 mounted on the axle so that it can be moved in longitudinal direction but not rotate with said axle. rlhe shifting of the clutch element 28 is controlled by a lever 28 pivotally mounted on an extension 31 of the casing 1 and to be operated by hand. rlhe enlarged end 30 of said lever 28 is in contact with the handle 2. A spring 31 embedded in the handle 2 bears against said end 30 of the lever and acts upon it in the direction of the arrow. The axle 7- is thus held out of engagement with the iiexible shaft 23. Vhen the handle 2 is gripped the clutch element 28 is automatically brougl'it in engagement with the claws of the sleeve 24 whereby the axle 7 is coupled with the flexible shaft Q3, the elements being automatically uncoupled soon as the handle 2 is released.

Fig. l shows the clutch coupling in the coupling position e. g. inthe position which it assumes when a pressure is exerted upon i the end 30 of the lever 28.

then the claws of the elements E24, 28 are in engagement the knife cylinder is coupled with the flexible shaft 23. lith the aid of the lever 28 the knife cylinder can be cou.- pled or uncoupled at will during the working. The flexible shaft 2B is preferably driven from an electromotor.

The handle 2 of the planing machine might be mounted on the casing l by means of a bail joint so that it can be oscillated with regard to said casing but secured in any adjusted posit-ion so thaty for working on not easily accessible workpieces, the handle might be brought into the most favorable position and secured in thisl position. An adjusting collar .29 keyed on axle T prevents displacement of said axle in the bashing 5 in axial direction.

The planing machine or the casing of the saine is of sach construction that portions of workpieces which are not easily accessible or curved can be planed.

I claim:

l. A hand planing machine comprising in combination a casing open at one end, a han dle on said casing, a knife cylinder of solid cross section, mounted onsaid casing, an axle of sait knife cylinder ournalled in the closed end of said casing so that its end projects rom said casing, a flexible shaft driven from a suitable source of power, means for couplinfr said flexible shaft with said axle of the knife cylinder, two bearing faces on said casing tangentially to the same for guiding said machine on the workpiece one of inridjbearing faces being adjustable and'consisting of a plate, bolts engaging with said casing Vtixedly holding said plate on said casing, and springs acting upon said bolts to press said plate against said casing.

A hand planing machine comprising in combination a casing open at one end, a handle on said easing, a knife cylinder of solid cross section, mounted in said casing, an axle made in one piece with said knife cylinder and joui-nailed in the closed end of said casing so that its other end projects from said casing, a flexible shaft driven from a suitable source of power1neans for coupling said flexible shaft with said axle of the knife cylinder, wo bearing faces on said casing tangentially to the same for guiding said machine on the workpiece one of said bearing faces being adjustableand consisting of a plate, bolts engaging with .said casing tixedly holding said plate on said casing. and springs acting upon said bolts to press said plate against said casing.l and an adjusting screw in the casing for adjusting the position of said plate.

3., A hand planing machine comprising in combination a cylinder :asing open at one end and of minimum size, a handle on said casing, a knife cylinder of solid cross section, mounted in said casing so that its end is flush with the open end of said casing, an axle made in one piece with said knife cylinder and journalled in the closed end of said casing so that its end projects from .said casing, a flexible shaft driven from a suitable source of power, a clutch mechanism for coupling said flexible shaft with said axle of the knife cylinder, a lever for operA ating said clutch mechanism, an extension of said casing in which said lever is pivote ally mounted.l an enlarged lower extension of said lever bearing against said handle.v a spring in said handle acting upon said extension of said lever, a fixed bearing face on said casing, and an adjustable hearing face on said casing for guiding said machine on the workpiece.

In testimony whereof l affix my signature,

GOTTFRIED JEHLE.

lill 

